
window.onload = function() {
    // start
    // hide help content
    let list1 = document.body.querySelectorAll('.nav-item #toolbar-help a')
    list1 && list1.forEach(e => {
        e.style.display = 'none'
    })

    let list2 = document.body.querySelectorAll('.nav-item #toolbar-help button')
    let aboutBtn = (list2 && list2[0]) || null
    if(aboutBtn) {
        aboutBtn.style.display = 'none'
    }
    // end
}